Open-source tool to detect Polymarket's incrementNonce() exploit (ghost fills)

Summary

• The post introduces "Nonce Guard," an open-source tool designed to protect algorithmic traders on the Polymarket prediction market from a specific exploit.
• The author's thesis is that a vulnerability called incrementNonce() allows malicious actors to cancel their losing trades after they have already matched, creating "ghost fills" and causing losses for legitimate traders. The author's tool mitigates this risk.
• Quality assessment: This is a technical announcement, not investment due diligence (DD). It describes a real, verifiable on-chain exploit and provides a software solution. The information is high-quality from a technical/risk management perspective but is not a market forecast.